Hardened Steel Button Drill Bit
The “button” design of this drill bit makes it excellent for unconsolidated rock with boulders.
Hardness (HRC/HRA) = 50 – 55

Outside Diameter (mm) / Unit Weight (kg)

R32

51 mm/0.42 Kg
76 mm/1.25 Kg

R38
76 mm/1.15 Kg
90 mm/1.54 Kg
100 mm/2.00 Kg

R51
90 mm/1.35 Kg
100 mm/1.50 Kg